swift开启线程的3种方式(其实很简单的)
发布时间:2020-12-14 01:36:01 所属栏目:百科 来源:网络整理
导读:import UIKit class swiftThreadDemo : UIViewController { var queue = NSOperationQueue() // init() // { // //alloc // super.init() // } deinit { //dealloc } func testGCDThread() { dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIOR
import UIKit class swiftThreadDemo : UIViewController { var queue = NSOperationQueue() // init() // { // //alloc // super.init() // } deinit { //dealloc } func testGCDThread() { dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,0),{ //这里写需要大量时间的代码 for var i = 0; i < 100000; i++ { println("GCD thread running.") } sleep(5); dispatch_async(dispatch_get_main_queue(),{ //这里返回主线程,写需要主线程执行的代码 println("这里返回主线程,写需要主线程执行的代码") }) }) } func testNSThread() { //方式一 //NSThread.detachNewThreadSelector("threadInMainMethod:",toTarget:self,withObject:nil) //方式二 var myThread = NSThread(target:self,selector:"threadInMainMethod:",object:nil) myThread.start() } func threadInMainMethod(sender : AnyObject) { for var i = 0; i < 100000; i++ { println("NSThread running.") } sleep(5); println("NSThread over.") } func testNSOperationQueue() { //func (op: NSOperation!) var mopt = myOperationThread() queue.addOperation(mopt) } } class myOperationThread : NSOperation { override func start() { super.start() } override func main() { for var i = 0; i < 100000; i++ { println("NSOperation running.") } println("NSOperation over.") } }调用: var st = swiftThreadDemo() st.testNSThread() sleep(2) st.testGCDThread() st.testNSOperationQueue()这就常用开启线程的3种方式 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |